Réponses

2014-03-12T21:07:29+01:00
Bonsoir

(7x-3)(4x-2)+(2x-3)(7x-3) = 0
(7x-3)(4x-2 + 2x-3) =0
(7x-3)(6x -5) = 0
soit
7x -3 = 0
7x = 3 et x = 3/7

soit 6x -5 = 0
6x = 5
x = 5/6